Resonac Corporation

Renesas Electronics Corporation

Yasumasa Watanabe

Akira Sakawaki

Daizo Endo

Sho Tonegawa

Tatsunori Shino

Mitsuhiro Ono

Kenji Kimura

Toshiro Fujisaki

Tomoyuki Noguchi

Yuta Miyamoto

A magnetic sensor includes: a substrate; and a sensitive portion disposed on the substrate and having a longitudinal direction and a transverse direction. The sensitive portion senses a magnetic field by a magnetic impedance effect. The sensitive portion includes a soft magnetic material layer composed of a soft magnetic material having uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction and sensing the magnetic field. The sensitive portion also includes a secondary soft magnetic material layer laminated between the substrate and the soft magnetic material layer. The secondary soft magnetic material layer is composed of a soft magnetic material with large saturation magnetization compared to the soft magnetic material constituting the soft magnetic material layer.

Magnetic sensor, method of manufacturing magnetic sensor, and sensitive element assembly

A magnetic sensor includes: a non-magnetic substrate; and a sensitive elementhaving a longitudinal direction and a short direction, provided with uniaxial magnetic anisotropy in a direction crossing the longitudinal direction, and sensing a magnetic field by a magnetic impedance effect, wherein the sensitive elementincludes plural soft magnetic material layerstoand plural non-magnetic material layerstoconfigured with a non-magnetic material and laminated between the plural soft magnetic material layersto, and the soft magnetic material layerstofacing each other with each of the non-magnetic material layerstointerposed therebetween are antiferromagnetically coupled.

Magnetic sensor

A magnetic sensor includes: plural sensitive elementseach including a soft magnetic material layerhaving a longitudinal direction and a transverse direction and a conductor layer having higher conductivity than the soft magnetic material layerand extending through the soft magnetic material layerin a longitudinal direction, the sensitive elementhaving uniaxial magnetic anisotropy in a direction intersecting the longitudinal direction and being configured to sense a magnetic field by a magnetic impedance effect; and a connecting portioncontinuous with the conductor layer of the sensitive element and configured to connect transversely adjacent sensitive elementsin series.

Magnetic sensor and method for manufacturing magnetic sensor

In a magnetic sensor using a magnetic impedance effect, sensitivity is improved as compared to the case where a width of a sensitive element in the short direction is equal from one end to the other end in the longitudinal direction. The magnetic sensor includes: a non-magnetic substrate; and a sensitive element that is provided on the substrate, composed of a soft magnetic material, having a longitudinal direction and a short direction, provided with uniaxial magnetic anisotropy in a direction crossing the longitudinal direction, having a width at a center portion in the longitudinal direction that is smaller compared to a width at each of both end portions in the longitudinal direction, and sensing a magnetic field by a magnetic impedance effect.

Power consumption of a semiconductor device is reduced. A semiconductor device according to an embodiment includes a plurality of circuits, a bus circuit including a plurality of buffers that temporarily store communication data between the circuits and a plurality of arbitration circuits that arbitrate an access between the circuits and the buffers, a storage unit that stores information based on a use state of the buffers during communication between the circuits and configuration information including designation of unused circuits that are not used for the communication from among the circuits, and a control circuit that controls the bus circuit so as to stop use of unused buffers that are not used for the communication from among the buffers and at least a partial configuration in arbitration circuits corresponding to the unused circuits from among the arbitration circuits based on the configuration information.

Growing community of inventors

Ichihara, Japan

Yasumasa Watanabe